﻿PHOCESS-BLOCKS AND OTHEB, ILLUSTRATIVE FIGURES, 

 BESIDES THOSE IN THE PLATES. 



Fig. Page 

 Map illustrating the area affected by the Leicester earth- 

 quakes of June 21st, 1904 4 



Map illustrating the area affected by the after-shock of 

 July 3rd, 1904 16 



1 . Excentricity of isoseismals in twin-earthquakes 25 



2. Variation of relative intensity in twin-earthquakes 27 



3-6, illustrating different cases of relative intensity in twin- 

 earthquakes 28 



7. Map illustrating the areas of maximum intensity of the 



Colchester earthquake of 1884 30 



Sarsen-stone embedded in clay, at Walter's Ash 39 



1 . Section from Eulwell Hill to Cleadon Hills 66 



2. Pre-Glacial (or Glacial) gravel- deposit at Newbiggin, near the 



mouth of the Wansbeck 68 



3. Raised beach on Fulwell Hills 70 



4. Nearer view of the same 71 



5. Diagram illustrating the depth below sea-level at which the 



rock-surface has been proved to occur, by borings along the 

 Tyne Valley, from Ey ton to the river-mouth 76 



6. Section from Billy Mill to Westoe, across the Tyne Valley ... 78 



7. Map showing the relation of the post-Glacial valleys of the 



Wansbeck, Blyth, and Sleekburn to the pre-Glacial ' Sleek- 

 burn Valley' 82 



8. Section across the pre-Glacial ' Sleekburn Valley ' between 



North Seaton and Bebside 84 



9. Map of the ' Druridge Valley ' 85 



vol. LXI. b 



